All participants completed anonymous online surveys in which their medical and psychological history was ascertained, along with their levels of compulsivity and ability to cope in specific situations. (sciencedaily.com)
The study, published online in Youth Violence and Juvenile Justice, used data from anonymous online surveys administered to students in grades 9 - 12 at 10 schools in a northeastern U.S. state between 2008 and 2011. (sciencedaily.com)
The data was gathered between 2013 and 2016 through YouthTruth's anonymous online surveys administered in partnership with public schools across 24 states. (youthtruthsurvey.org)